From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Visit from a Dunlop engineer to demonstrate new low-pressure tyres on a Rover and a Cadillac.
| Identifier | WestWitteringFiles\J\May1923\ Scan57 | |
| Date | 16th May 1923 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c.c. to CJ. c.c. to E.{Mr Elliott - Chief Engineer} c.c. to De. c.c. to BY.{R.W. Bailey - Chief Engineer} ORIGINAL. Hs{Lord Ernest Hives - Chair}5/LG16.5.23. TYPES. X4565 (crossed out) X3538 We have recently had a visit from Mr. Macbeth Experimental Engineer for the Dunlop Rubber Co. He brought over two cars - a 16-h.p. Rover and an 8-cylinder Cadillac. These cars were fitted with special low pressure tyres which they have been developing for some time. The Rover car was running with tyres the same diameter to those used on the Goshawk - 32 X 4 1/2. The tyre, however, was a 6" section. They were using 15 Lbs. pressure in the front tyres and 20 Lbs. pressure in the rear. The riding of the car in these circumstances was astonishingly good. The absence of rattles and noises was noticeable when travelling over a bad road. The car could be driven over an obstacle, such as a brick, with very little shock. The Cadillac car was fitted with a section of tyre suitable for the 40/50 HP. These were running with 25 Lbs. pressure. The comfort of this car was also remarkable. The tyres have a number of advantages apart from being able to run with low pressures. They could be taken on and off with bare fingers - no tools - this was demonstrated to us. The rims have no loose flange; they are similar in design to an ordinary bicycle hollow rim. The rims are hollow so that when the tyre is pushed off the bead, it drops into the hollow and can be pulled off from the other side in the same way as a bicycle tyre. contd:- | ||